JPH0227108B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to a turret device in a machine tool.

(Prior Art) In machine tools that perform multiple series of operations, such as positioning and clamping an indexed and rotated turret table, and connecting machining power to the tool side, multiple actuators are used for each operation. are provided to actuate the actuators in a desired order;
Each actuator is provided with members such as a switching valve and a limit switch for operating the switching valve.

(Problems to be Solved by the Invention) For this reason, the conventional turret device has a large number of parts and has problems such as the inability to simplify and downsize the structure.

The present invention has been devised in view of the above circumstances, and an object of the present invention is to provide a turret device that can reduce the number of parts, simplify the structure, and make it more compact. .

(Means for Solving the Problems) Therefore, in the present invention, a turret table having a plurality of tool heads on its outer periphery is rotatably attached to a diagonal support of a base frame, and the turret table is rotatably attached to a diagonal support of a base frame, and The turret device is equipped with a clutch mechanism for engaging and disengaging the tool and machining drive unit, and is equipped with an indexing mechanism, a positioning mechanism, a clamping mechanism, and a cutting oil supply mechanism, and each mechanism is equipped with compressed fluid. Each cylinder unit is equipped with a piston-operated cylinder unit. Then, each of these cylinder units is connected with two fluid circuits that can change the flow path with a switching valve.
One fluid circuit was formed by connecting the cylinder chambers on one side in series across the piston of each cylinder unit to form a sequence circuit. In the other fluid circuit, the cylinder chambers on the other side of each cylinder unit of a predetermined mechanism are connected in parallel to form a parallel circuit, and a flow path to the cylinder chamber of the positioning mechanism is provided with a throttle valve.

(Function) The fluid circuit on the sequence circuit side that connects the cylinder units of each mechanism in series allows a series of operations to be performed reliably in the desired order, and the fluid circuit on the parallel circuit side allows A series of other operations can be performed quickly. At this time, the throttle valve in the middle of the cylinder chamber of the positioning mechanism
Since only the positioning operation is performed with a slight delay, the turret table is held in a stable state until the end, and no wear and tear is caused to other mechanisms. Further, there is no need to provide a switching valve or a limit switch for each actuator as in the past, and the number of parts can be reduced and the structure can be simplified and made more compact.

(Example) The turret device will be described below with reference to the accompanying drawings.

FIG. 1 is a perspective view of a machine tool equipped with a turret device, FIG. 2 is a sectional view of a main part of the turret device, and FIG. 3 is a sectional view of a main part of a cutting oil supply mechanism.

1 is a base, 2 is a vertical feed table, and 3 is a horizontal feed table. A base frame 5 is fixed on the horizontal feed table 3, a turret device 6 is provided via the base frame 5, and a vertical feed motor 7 is used. The turret device 6 is slid in the vertical direction together with the vertical feed table 2, and the turret device 6 is slid in the horizontal direction together with the horizontal feed table 3 by the vertical feed motor 8. The guide block of the feed table 3 is shown.

A table 15 is provided on the base 1 facing the turret device 6, a jig stand 16 is fixed to the table 15, and a pallet 17 with a workpiece (not shown) attached thereto.
is fixed to the jig stand 16.

As shown in FIG. 2, the turret device 6 includes a turret table 21 rotatably attached to the base frame 5, and a plurality of turret heads 22 are provided on the outer periphery of the turret table 21 at intervals in the circumferential direction. Attachment: A tool head 24 with a tool 23 attached thereto is attached to each turret head 22.

The turret table 21 has an index rotation mechanism 3.
1 and its drive unit 32, the desired tool 23 is indexed to a machining position A facing the workpiece side, and at this machining position A the turret table 21 is positioned by a positioning mechanism 34 and fixed by a clamp mechanism 35. Ru.

Then, at the machining position A, the cutting oil supply mechanism 37
is connected to the turret head 22 to supply oil to the machining location, and machining power is transmitted to the tool 23 via the clutch mechanism 38, so that the tool 23 machining the workpiece.

Next, each member and mechanism will be explained.

On the processing position A side of the base frame 5, an annular support surface 41 is formed obliquely upward at an angle of 45 degrees with respect to the horizontal plane, and an annular protrusion 42 is formed from the inner peripheral side of the support surface 41.

A hollow support 43 is fixed to the protrusion 42 with its axis perpendicular to the support surface 41 via bolts 44, and a spindle 45 is installed inside the base frame 5 via bearings 46. Provided to be rotatable.

A motor 5 for driving the spindle 45 is mounted on the wall portion of the base frame 5 on the opposite side of the processing position A.
1 and a hydraulic clutch actuating cylinder 52 are provided.

The output shaft 53 of the motor 51 and the spindle 45
and are connected via gears 54 and 55.

The clutch actuating cylinder 52 is disposed with its axis parallel to the axis of the spindle 45, and as the piston rod 61 moves back and forth, the forked arm 63 swings about the support shaft 62.

The spindle 45 is provided with a hollow clutch rod 66 that rotates together with the spindle 45 through a key 65, and the arm 6 is connected to a flange portion 67 of the clutch rod 66 through rollers 68, 68.
3 is engaged, and the swinging of the arm 63 causes the clutch rod 66 to slide on the spindle 45.

The clutch rod 66 has a coil spring 7
The clutch mechanism 38 is made up of the clutch actuating cylinder 52, arm 63, clutch rod 66, spring 71, etc.

As shown in FIG. 3, a bracket 74 having an oil passage 73 is installed vertically on the turret head 22, and a hydraulic type is installed on the horizontal feed table 3, facing the bracket 74 of the turret head 22 indexed to the machining position A. A cutting oil supply cylinder 76 is provided.

The cutting oil supply cylinder 76 has a casing 77
a piston rod 78 slidably fitted into the
Shaft pin 79 protruding from casing 77
A joint member 81 is coupled to the piston rod 78.

The joint member 81 is provided with an oil passage 83 connected to the flexible tube 82, and when the piston rod 78 is extended, the outlet 85 is connected to the oil passage 73 of the bracket 74 to supply cutting oil to the turret head 22 side. When contracting, the oil passage 83 is shut off by the shaft pin 79 to stop the supply of oil to the turret head 22 side.A cutting oil supply mechanism 37 is constituted by the cutting oil supply cylinder 76, joint member 81, etc.

The turret table 21 has upper and lower inner peripheral parts 9.
1 and 92 are rotatably assembled to the outer periphery of the support column 43 and the base of the base frame protrusion 42 via bearings 93 and 94, respectively, and 95 in the figure indicates a retaining plate for the bearing 94.

A plurality of openings 101 are formed on the outer periphery of the turret table 21 at intervals in the circumferential direction,
A turret head 22 is attached to each opening 101.

The tool head 24 is provided with an input shaft 102 extending to the rear side, and a clutch rod 66 that moves axially via an arm 63 by the operation of the clutch actuating cylinder 52 and the input shaft 102 are connected to the spline 1.
The spindle drive motor 5
Transmission and interruption of the power to the tool 23 is performed, and the transmission and interruption of the power to the tool 23 are detected by proximity switches 104 and 105.

Upper inner circumferential portion 91 of the turret table 21
A flange member 108 having a connecting hole 107 is fixed to the support surface 41 from the lower inner circumference 92.
A slidable annular flange portion 109 is formed in a protruding manner.

A plurality of notches 111, .
12, the positioning pin 113 is engaged with and disengaged from the notch 111, and the turret table 21 is positioned and released.

In the embodiment, the piston rod of the positioning cylinder 112 also serves as the positioning pin 113, and the cutout 111, the positioning cylinder 112, etc. constitute a positioning mechanism 34.

An annular protrusion 121 is formed to protrude from the outer periphery of the support surface 41, and a clamp plate 122, which is an annular plate, is fixed to the protrusion 121, and the clamp plate 122 faces the upper surface of the flange portion 109.

The clamp plate 122 is provided with a plurality of clamp cylinders 125, .
The clamp plate 122, the clamp cylinder 125, and the like constitute a clamp mechanism 35. The clamp plate 122, the clamp cylinder 125, and the like constitute a clamp mechanism 35.

The pillar 43 has an open space 13 diagonally upward.
1, and a hydraulic motor 132 for indexing and rotating the turret table, which constitutes the drive section 32, is connected to the space section 13.
1 and the casing 13 of the hydraulic motor 132
3 fits into a fitting part 134 on the upper part of the wall defining the space 131.

The hydraulic motor 132 includes a rotating shaft 142 in which an oil passage 141 is formed, and a casing 133.
The rotating shaft 142 portion protruding from the lower surface of the support column 43
The oil passage 144 on the side of the base 143 and the oil passage 141 are formed so as to be able to communicate with each other and to be disconnected from each other.

An arm 151 that rotates together with the rotating shaft 142 is fixed to a portion of the rotating shaft 142 that protrudes from the upper surface of the casing 133.

A connecting cylinder 15 is provided at the tip of the arm 151.
2 is provided, and the connecting cylinder 152 and the oil passage 141 are connected to each other.
are connected to each other via an oil passage formed in the arm 151, and the connection pin 1 is connected by the operation of the connection cylinder 152.
55 is engaged and disengaged from the connecting hole 107.

In the embodiment, the piston rod of the connecting cylinder 152 also serves as the connecting pin 155, and the arm 1
51 is detected by a proximity switch 156, and the turret table 21 is indexed and rotated by the arm 151, the connecting cylinder 152, the connecting hole 107, and the like. The cover of the rotation mechanism 31 is shown.

Next, referring to FIG. 4, the cylinders 52, 7
Oil passage 2 that operates 6, 112, 125, 152
01 will be explained.

202 is a switching valve, and the switching valve 202 has a port 204 connected to an oil pump P serving as a compressed fluid source.
and port 205 connected to the oil tank T side.
and ports 206 and 207 provided corresponding to both the ports 204 and 205.

The positioning operation cylinder chamber 112a of the positioning cylinder 112 and the one port 206 are connected via an oil passage 211 and a port 212.

A port 213 facing the cylinder chamber 112a is formed in the cylinder chamber 112a for positioning operation by movement of the piston portion 113a when the engagement operation of the positioning pin 113 with the notch 111 is completed, and the port 213, the oil passage 214, and the port 215, the cutting oil supply cylinder chamber 76a of the cutting oil supply cylinder 76 and the cylinder chamber 112a are connected.

A joint member 81 is connected to the bracket 74 in the cutting oil supply cylinder chamber 76a, and the piston 78a moves to fill the cylinder chamber 76a.
A port 221 facing the cylinder is formed, and the cylinder chamber 152a for disconnection of the connecting cylinder 152 is connected to the cylinder chamber 76a through the port 221, an oil passage 222, and a port 223.

With the connecting pin 155 pulled out from the connecting hole 107, the cylinder chamber 1 is opened by moving the piston portion 155a.
A port 225 facing the port 52a is formed, and the port 225 is
25, an oil passage 126, and a port 227, the cylinder chamber 125a of the clamp cylinder 125 and the cylinder chamber 152a are connected.

A one-way valve 231 is provided in the oil passage 126, and the downstream side of the one-way valve 231 in the oil passage 126 is connected to the clutch connection cylinder chamber 52a of the clutch actuation cylinder 52 via the oil passage 231 and the port 232. .

Further, the oil passages 214, 222, 126 are provided with one-way valves 241, 24 that allow oil to flow out from the respective cylinder chambers 76a, 152a, 125a, 52a.
Oil passages 245, 246, 2 with 2, 243, respectively
47, and each oil passage 245, 246, 247 is connected to an oil passage 211 that connects the cylinder chamber 112a and the port 206.

The other port 207 of the switching valve 202, the positioning release cylinder chamber 112b of the positioning cylinder 112, the operation release cylinder chamber 76b of the cutting oil supply cylinder 76, the connection operation cylinder chamber 152b of the connection cylinder 152, and the clutch operation cylinder 52 clutch release cylinder chambers 52b are connected through oil passages 251, 252, 253, and 254, respectively, and the oil passages 251 are provided with a throttle 261 and a one-way valve 262 that allows oil to flow out from the cylinder chamber 112b. establish.

Next, the case of machining a workpiece will be explained.

First, the hydraulic motor 132 is driven via a switching valve different from the switching valve 202, and the turret table 21 is indexed and rotated to position the desired tool 23 at the machining position A.

Next, operate the switching valve 202 to switch the oil pump P.
Pressure oil is supplied to the positioning cylinder 1 through the oil passage 211.
12 cylinder chambers 112a for positioning operation, and the positioning pins 113 are engaged with the notches 111 to position the turret table 21.

After the positioning pin 113 is engaged with the notch 111,
Due to the movement of the piston part 113a, the port 213 faces the cylinder chamber 112a, and the pressure oil flows through the port 213.
The oil is supplied to the cutting oil supply cylinder chamber 76a of the cutting oil supply cylinder 76 through the oil passage 214 and the port 215.

The supply of pressure oil to the cylinder chamber 76a causes the cutting oil supply cylinder 76 to extend and connect the joint member 81 to the bracket 74, thereby connecting the tool head 22.
Supply cutting oil to the side.

After the joint member 81 is connected to the bracket 74, the piston portion 78a moves to connect the port 221.
faces the cylinder chamber 76a, and the pressure oil is connected to the port 22.
1. The oil is supplied to the disconnection cylinder chamber 152a of the connection cylinder 152 through the oil passage 222 and port 223.

The connection cylinder 152 is contracted by supplying pressure oil to the cylinder chamber 152a, and the connection pin 155 is pulled out from the connection hole 107.

After the connecting pin 155 is extracted from the connecting hole 107, the port 2 is opened by moving the piston portion 155a.
25 faces the cylinder chamber 152a, and pressure oil is supplied to the clamp cylinder chamber 12 of the clamp cylinder 125 through the port 225, oil passage 126, and port 227.
5a, and also to the clutch connecting cylinder chamber 52a of the clutch actuating cylinder 52 through the port 225, oil passage 231, and port 232, and the piston 127 is supplied to the clutch connecting cylinder chamber 52a of the clutch actuating cylinder 52 through the
The turret table 21 is clamped, the clutch rod 66 is connected to the input shaft 102 by the operation of the clutch actuating cylinder 52, and the tool 23 is rotated by the power of the drive motor 51 to machine the workpiece.

After finishing machining the workpiece with the tool 23, the switching valve 2
02 to connect port 206 to the oil tank T side and port 207 to the oil pump P side.

The oil passages are connected to the positioning/release cylinder chamber 112b of the positioning cylinder 112 and the cutting oil supply cylinder 7 via oil passages 251, 252, 253, and 254, respectively.
6, the coupling cylinder chamber 152b of the connecting cylinder 152, and the clutch releasing cylinder chamber 52b of the clutch actuating cylinder 52. By separating the positioning pin 113 from the bracket 74, engaging the connecting pin 155 with the connecting hole 107, and separating the clutch rod 66 from the input shaft 102, the operation of extracting the positioning pin 113 from the notch 111 is performed by the throttle 261, compared to the above-mentioned operations. It is done late.

For this reason, the turret table 21 is held in position by the positioning pin 113 until the other mechanisms are disengaged, and the turret table 21 is unstable, causing wear and tear on the engaging parts of the other mechanisms. There are no problems.

and the cylinder chamber 112 for positioning operation.
a, cutting oil supply cylinder chamber 76a, connection release cylinder chamber 152a, clamp cylinder chamber 12
5a, oil in each cylinder chamber of the clutch connection cylinder chamber 52a is supplied through oil passages 211, 214, 222, 12.
6,231,245,246,247, oil tank T via one-way valve 241,242,243
The clamping operation of the turret table 21 by the clamp cylinder 125 is released.

Therefore, according to this embodiment, a series of various operations of the turret device 6 in a machine tool can be performed in a desired order and reliably without providing a switching valve, a limit switch, etc. for each actuator as in the conventional case, and the number of parts can be reduced. It is possible to reduce the number of parts, simplify the structure, and make it more compact.

(Effects of the Invention) As described above, the turret device of the present invention can reduce the number of parts, simplify the structure, and make it more compact. Accordingly, on the other hand, the operation after the completion of machining can be carried out quickly and without causing wear and tear on parts.

[Brief explanation of drawings]

Fig. 1 is a perspective view of a machine tool equipped with a turret device, Fig. 2 is a sectional view of the main part of the turret device, Fig. 3 is a sectional view of the main part of the cutting oil supply mechanism, and Fig. 4 is a sectional view of the main part of the cutting oil supply mechanism. It is a schematic diagram of an oil path. In the drawing, 5 is a base frame, 21 is a turret table, 31 is an index rotation mechanism, 32 is a drive section, 34 is a positioning mechanism, 35 is a clamp mechanism,
37 is a cutting oil supply mechanism, 38 is a clutch mechanism, 5
2 is a clutch actuation cylinder, 76 is a cutting oil supply cylinder, 112 is a positioning cylinder, 125 is a clamp cylinder, and 152 is a connecting cylinder.

Claims (1)

[Claims] 1. A plurality of tool heads are provided at equal intervals on the outer periphery of a rotatable turret table mounted on an oblique support of the base frame, and a tool and a processing drive unit are mounted on the back side of the tool head at the processing position. In a turret device equipped with a clutch mechanism for engaging and disengaging, the turret device includes an indexing mechanism that indexes any one tool head of the turret table to a machining position, and a clutch mechanism that indexes any one tool head of the turret table to a processing position; It is equipped with a positioning mechanism for positioning, a clamp mechanism for fixing the turret table to the base frame, and a cutting oil supply mechanism for supplying cutting oil to the machining section. At the same time, these cylinder units are connected by two fluid circuits that can change the flow path with a switching valve, and one of these fluid circuits is
The cylinder chambers on one side are connected in series across the pistons of the cylinder units of each mechanism to form a sequence circuit that operates sequentially according to piston displacement, and the other fluid circuit connects the cylinder chambers on the other side of each cylinder unit of a given mechanism in series. A turret device for a machine tool, characterized in that the parallel circuit connects cylinder chambers in parallel, and a flow path to the cylinder chamber of a positioning mechanism is provided with a throttle valve for controlling the flow rate.